- Heterocyclic Schiff base derivatives containing pyrazolone moiety: Synthesis, characterization, and in vitro biological studies
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In this study, some pyrazolone-based Schiff base derivatives 2a-e (except 2a) were synthesized for the first time and structurally illuminated by some spectroscopic techniques (1H, 13C NMR, FT-IR) and elemental analysis. All synthesi
- ??nar, Ercan,Ba?aran, Eyüp,Erdo?an, ?mer,?akmak, Re?it,Bo?a, Mehmet,?evik, ?zge
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p. 2355 - 2367
(2021/10/25)
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- New imidazolone derivatives comprising a benzoate or sulfonamide moiety as anti-inflammatory and antibacterial inhibitors: Design, synthesis, selective COX-2, DHFR and molecular-modeling study
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New imidazol-5-one derivatives 12a,b and 12e, f, 14a,b and 16a,b were synthesized and screened for their in vivo anti-inflammatory activity using a standard acute carrageenan-induced rat paw oedema method. All the tested compounds exhibited good anti-infl
- Metwally, Nadia Hanafy,Mohamed, Mona Said
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- Green synthesis of some new thiopyrano[2,3-d][1,3]thiazoles using lemon juice and their antibacterial activity
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A simple green method has been developed for the synthesis of a series of new 3-phenyl-6-(substituted)-thiopyrano[2,3-d]thiazole-2,5,7(6H)-triones, 6-cyano-2-oxo-3-phenyl-thiopyrano[2,3-d]thiazoles, 3-phenyl-3,5,5a,11b-tetrahydro-2H,6H-chromeno-[4′,3′:4,5
- Metwally, Nadia Hanafy,Badawy, Mohamed Ahmed,Okpy, Doha Samir
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p. 2496 - 2509
(2018/10/20)
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- Synthesis of lignin model compound containing a β-O-4 linkage
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Development of catalysts for efficient conversion of lignin polymer to value-added materials requires appropriately-functionalized lignin model compounds. The predominant structural feature of lignin biopolymer is an extensive network of β-O-4 linkages. A
- Mukhtar, Asma,Zaheer, Muhammad,Saeed, Muhammad,Voelter, Wolfgang
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p. 119 - 124
(2017/12/26)
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- Ph3P-I2 mediated aryl esterification with a mechanistic insight
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In order to better understand the reaction mechanism and to obtain optimal conditions, the Ph3P-I2/Et3N mediated aryl esterification reaction was thoroughly investigated. Using a specific reagent addition sequence, the reaction proceeds remarkably well especially with acidic substrates. 31P NMR studies revealed that the formation of an aryloxyphosphonium salt is crucial in governing the reaction path toward the formation of phenolic esters.
- Phakhodee, Wong,Duangkamol, Chuthamat,Pattarawarapan, Mookda
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supporting information
p. 2087 - 2089
(2016/04/26)
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- Solid-Phase Benzoylation of Phenols and Alcohols in Microwave Reactor: An Ecofriendly Protocol
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An efficient solid-phase benzoylation of phenols and alcohols was developed under microwave irradiation. A stoichiometric amount of benzoyl chloride was sufficient to carry out the reaction. This benzoylation features short reaction time, good yields, and easy workup procedures. Furthermore, the scope of the reaction was extended to prepare 3,5-dinitrobenzoyl derivatives of alcohols.
- Chakraborty, Suchandra,Saha, Ahana,Basu, Kaushik,Saha, Chandan
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supporting information
p. 2331 - 2343
(2015/10/12)
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- A green chemistry method for the regeneration of carbonyl compounds from oximes by using cupric chloride dihydrate as a recoverable promoter for hydrolysis
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A mild, efficient, general, and green method for the regeneration of carbonyl compounds from their corresponding oximes is described. Cupric salts promoted hydrolysis of oximes was studied, and the best reaction conditions for the hydrolysis have been found. Carbonyl compounds were obtained in 85-98% yields after the treatment of oximes with 2 molar equivalent of CuCl 22H2O at reflux (around 75 C) in a mixed solvent of acetonitrile and water (4:1). In addition, cupric salt was readily recovered in an almost quantitative yield via the complete precipitation of Cu(OH) 22H2O. Georg Thieme Verlag Stuttgart · New York.
- Quan, Na,Shi, Xiao-Xin,Nie, Liang-Deng,Dong, Jing,Zhu, Rui-Heng
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experimental part
p. 1028 - 1032
(2011/06/17)
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- Nature and kinetic analysis of carbon-carbon bond fragmentation reactions of cation radicals derived from SET-oxidation of lignin model compounds
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Features of the oxidative cleavage reactions of diastereomers of dimeric lignin model compounds, which are models of the major types of structural units found in the lignin backbone, were examined. Cation radicals of these substances were generated by using SET-sensitized photochemical and Ce(IV) and lignin peroxidase promoted oxidative processes, and the nature and kinetics of their C- bond cleavage reactions were determined. The results show that significant differences exist between the rates of cation radical C1-2 bond cleavage reactions of 1,2-diaryl-(β-1) and 1-aryl-2-aryloxy-(β-O-4) propan-1,3-diol structural units found in lignins. Specifically, under all conditions C1-2 bond cleavage reactions of cation radicals of the β-1 models take place more rapidly than those of the β-O-4 counterparts. The results of DFT calculations on cation radicals of the model compounds show that the C1-2 bond dissociation energies of the β-1 lignin model compounds are significantly lower than those of the β-O-4 models, providing clear evidence for the source of the rate differences.
- Cho, Dae Won,Parthasarathi, Ramakrishnan,Pimentel, Adam S.,Maestas, Gabriel D.,Park, Hea Jung,Yoon, Ung Chan,Dunaway-Mariano, Debra,Gnanakaran,Langan, Paul,Mariano, Patrick S.
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experimental part
p. 6549 - 6562
(2010/12/19)
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- Esters derived from vanillin and vanillal and aromatic and functionalized aliphatic carboxylic acids
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Reactions of vanillin and vanillal with aromatic and functionally substituted aliphatic carboxylic acid chlorides in the presence of pyridine afforded the corresponding previously unknown esters.
- Dikusar,Kozlov
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p. 992 - 996
(2007/10/03)
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- PhCOCI-Py/basic alumina as a versatile reagent for benzoylation in solvent-free conditions
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A solvent-free procedure using PhCOCl-Py/basic alumina under microwave irradiation has been developed for N-, O- and S-benzoylation.
- Paul, Satya,Nanda, Puja,Gupta, Rajive
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p. 374 - 380
(2007/10/03)
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- A mild, simple and general procedure for the oxidation of benzyl alcohols to benzaldehydes
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The enzyme/cofactor system laccase/2,2'-azino-bis(3 ethyl-benzothiazoline-6-sulfonic acid) catalyzes the oxidation of benzyl alcohols to the corresponding benzaldehydes by molecular oxygen. The reaction proceeds under physiological conditions to yield the products quantitatively.
- Rosenau,Potthast,Chen,Gratzl
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p. 315 - 320
(2007/10/03)
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